How to Customize the Shopify Checkout (Without Plus)

If you're on a Basic, Grow, or Advanced Shopify plan, you have more checkout customization power in 2026 than you did a few years ago. But the Plus divide is still real, and it's worth being clear about where the line sits before you start scoping a project.

Here's what non-Shopify Plus merchants can actually do to customize their checkout.

The general rule of thumb

Anything that runs as a public Shopify Functions app, or as a Thank You, Order Status, post-purchase, or Customer Accounts UI extension, is available to everyone on a paid plan above Starter.

Anything that runs as a custom UI extension on the Information, Shipping, or Payment steps, or covers the full Checkout Branding API and per-market checkout, is Plus-only.

The official Shopify rule is worth knowing: stores on any plan can use public apps distributed through the Shopify App Store that contain Functions. Only Plus stores can use custom apps that contain Shopify Function APIs.

Shopify Functions are doing a lot of work to bridge the gap. Discount, Cart and Checkout Validation, Delivery Customization, Payment Customization, Cart Transform, and Pickup Point Function APIs are all live for non-Plus merchants through public apps.

Part 1: What you can do with no code/low code

Native Checkout Editor

Standard checkout customizations are available on all pages for businesses on the Basic plan or higher.

In the Checkout & Accounts editor, non-Plus merchants can:

• Upload a store logo and set its position

• Set the header background color and accent color

• Set the main content area background color (no background image)

• Choose form-field treatment (Transparent or White) and error message color

• Select fonts from Shopify's font picker, limited to system and Shopify-hosted fonts

That's the baseline. It's not nothing, but it's not a brand-level checkout either.

One Overlooked Native Option: Edit Default Theme Content

The "Edit Default Theme Content" setting inside your published theme doesn't get much attention, but it lets you override standardized checkout messaging without touching code.

One example shown here demonstrates how that setting, which might often get overlooked, becomes helpful in updating standardized shipping and delivery information.

1. On your published theme, select the three dots and click on “Edit default theme content”.

2. Navigate to Checkout & System

3. Edit the content of the “Estimated delivery date range” or “Checkout shipping estimated delivery date." 

 

This way, the users can bypass the automatic delivery time calculations and manual generic business days statement to a message of their liking.

What apps can do for Basic users?

The honest caveat: the Shopify App Store doesn't offer much for the core Information, Shipping, and Payment checkout pages on Basic plans. Those remain Plus-only territory.

Where Basic merchants do have app flexibility is in the Thank You and Order Status pages, and in post-purchase slots.

Cart and Checkout Validation

• Blockify Checkout Form & Rules. Address blocker, country blocker, B2C/B2B rules. Basic and Premium tiers work on non-Plus; Plus tier unlocks in-checkout customizations.

• Cart Lock: Block Checkout Rules. Block by country, currency, customer tag, discount amount, or shipping zone.

• King Checkout Validation. Address validation, VAT/tax ID, postcode/ZIP, PO box detection, regex rules, localized errors.

Payment Customization (all Functions-powered, all work on non-Plus)

• HidePay: Hide Payment Methods. Hide, sort, and rename payment methods using AND/OR rules. Built using native Shopify Functions. Note: hiding PayPal Express specifically is Plus-only due to the underlying express-checkout API.

• PayRules: Hide Payment Methods by KlinKode. Hide COD, PayPal, Stripe, or bank deposit by cart total, country, customer tag, or product type.

Part 2: What you can do with code (via Shopify Functions)

With Scripts winding down on June 30, Functions are now the path forward for backend checkout logic.

On a Basic plan, through a public app, you can use Functions to customize discount logic, validate or block carts that don't meet rules, rename and hide delivery options, and rename and reorder payment methods. Local pickup option generators work too. The Function code runs server-side within Shopify's infrastructure and affects checkout behavior across all paid plans.

Where Functions stop short on non-Plus

The UI side of the checkout is where the plan matrix tightens.

This is why apps like AfterSell, ReConvert, and Cart-X can deliver post-purchase one-click upsells on Basic-plan stores, often the highest-converting upsell moment in the funnel, while no comparable app exists for adding UI inside the main checkout steps without Plus.

The full picture: Basic vs. Plus

Across both no-code and code options, this is how the two compare. Checkout Blocks makes the difference most visible.

On Basic, Checkout Blocks is a post-purchase messaging tool. On Plus, it becomes a full checkout customization engine. If what you need is a thank-you banner, you're fine. If you need a terms checkbox, a gift message field, or method renaming on the checkout page itself, that's the upgrade line.

When does Shopify Plus actually make sense?

Functions closed most of the tactical checkout gap, but not the strategic one.

They did not erase the reasons to go Plus. Four of those reasons still hold:

1. Custom UI inside the checkout steps. Functions run the logic on the Information, Shipping, and Payment steps. They cannot place fields or components on those steps. That rendering only happens on Plus.
2. Full control over branding. The checkout editor at Settings > Checkout lets any plan set the logo, colors, fonts, and basic layout. Control over structure, type sizing, and component styling runs through the Checkout Branding API. That API is Plus only.
3. Multiple checkout profiles and per-market checkout. A brand selling into several regions with different rules, languages, or tax and compliance needs has to split checkout by market. No app does this for you.
4. Custom apps built on the Function APIs. Any plan can install public Functions apps from the App Store. Writing your own Function against your own business logic requires Plus.

One more point, these decisions tend to miss... the upgrade is rarely about checkout by itself. Wholesale and B2B, expansion stores, higher API limits, and the transaction fee structure at higher volume usually carry more weight than any single checkout feature. At enough GMV, the lower fee rate can pay back a chunk of the plan cost. Run that math before you decide on checkout features alone.

Most brands customizing a Basic or Advanced checkout in 2026 can get a clean, on-brand, rule-driven result without Plus. The brands that need Plus can see it in their requirements before they ever look at the price.

What to do next?

Three priorities for this quarter:

1. Audit your post-purchase pages now. Check the Thank You and Order Status pages for any Additional Scripts or checkout.liquid customizations and migrate them. Non Plus stores have until August 26, 2026. If you are coming from a Plus environment, the June 30, 2026 Scripts deadline is a separate track and the more urgent one.
2. Get the checkout editor and theme content right before you reach for apps. Settings > Checkout covers logo, colors, fonts, and layout. Most of the brand consistency wins live there, and they add no app overhead.
3. Build the app stack deliberately. One discount Function app, one validation, one payment customization, one delivery rule if you need it. Four apps chosen on purpose beat ten that overlap.

Working on a checkout project and not sure where your plan draws the line? Shero's Shopify CRO team can scope what is achievable on your current plan and what genuinely needs Plus.